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V (No Modelf.)

W. DODGE 8v G. PHILION.

SBPARABLE PULLE-Y.

Patented July 4, .1882..

l No. 260,462.

UNITED STATES PATENT OEEICEo WALLACE H. DODGE AND GEORGE PHILION, OF MISHAWAKA, INDIANA.

l s SEPARABLE PU LLEY.

SPECIFICATION forming part of Letters Patent No. 260,462, dated July 4, 1882.

l Application tiled May 29, 1862. (No model.)

To all whom it may concern:

Be it known that we, WALLACE H. DODGE and GEORGE PEILION, of Mishawaka, in the countyof St. Joseph and State of Indiana,have invented a new and useful Improvement in Separable Pulleys; and we do hereby declare that the following is a full and accurate description of the same.

Heretofore separable pulleys have been made in parts fitted and bolted together prior to being bored and turned, and therefore they were fitted to the shaft and secured thereon in ordi nary way. Such pulleys are not interchangeable as to shafts of different diameters.

Our improvement obviates, rst, the old and imperfect mode of fastening the pulley in place ou the shaft, and, second, renders the same pulley readily applicable to shafts of different diameters, or as afast or loose pulley.

In addition to the above, we propose to make ourpulleys of wood and in a structural way which will greatly cheapen and add to theireftic1ency.

We are aware that wooden pulleys have heretofore been made, and therefore do not claim such broadly, but only with relation to the structural methods hereinafter described.

That others may fully understand our invention, we will particularly describe it, having reference to the accompanying drawings, where- 1nd Figure lis a perspective of our pulley. Fig. 2 is a section of the same transverse to the axis. Figs'. 3 and 4 represent the separable spool-huh.

A represents our pulley, and themode of structure is as follows: We first form up of segments a b c a ring, the parts being glued and nailed or doweled together. This ring forms the central part ofthe pulley, and after being turned it is cut in halves transversely.

The spoke and hub barB is prepared either by properly fashioning a wooden stick in the lathe and afterward slitting it in two, as

shown, or by ittin g together properly two sepy arate bars. These parts are secured at their ends to the ends of the ring-segments in some proper and efficient manner, and for this purpose we prefer the dovetail, as shown. The parts of the bar B are so placed in the ringsegments that they will not touch each other at the axis or hub of the wheel when the ringp segments are placed in position. The clamping-bolts G G are then inserted with pieces of thin wood 0r velleering, I, between the parts of the bar B, to prevent them from springing togetherunder the action of the bolts while being turned in the lathe. The exterior rim-segments,dc f g, are then applied and secured by glue, nails, or other suitable means, and cut transversely in line with the previous cut. After this is done the pulley is turned on its face and edges, and the 'central part of the spoke arm or hub his bored truly central. This bore may be adapted exactly to a shaft, S, of some definite size, and the .pulley may be applied thereon, the pieces of veneeringbeingremoved, so that the bolts G may then draw the parts B forcibly upon the shaft, and thereby clamp the pulley-hub against said shaft, and in that way obtain an adhesion due to area of surfaces in contact. This is a much stronger adhesion than is possible where thearea of contact is confined to the point of a set-screw on one side and a small segmentof the hub on the opposite side.

This method of securing a pulley upon a shaft is equally applicable to wooden or metallic pulleys.

The use of separable pulleys is largely for temporary purposes, and it is therefore sinetimes extremely inconvenient to properly fit a pulley to a shaft for which it is not adapted. To obviate this difiiculty we employ removable thimbles H, made also in halves, and these can be provided in sets or quantities adapted to shafts of various sizes; or, if necessary, at small expense one of these thimbles can be bored to fit a shaft of any unusual diameter, so that no change whatever in the puls ley will be required. The tension of the same bolts, G G, fastens and clamps the pulley to the split thimble and the thimble to the shaft. This method ot' adapting a pulley to shafts of various sizes is also equally applicable to me tallic or wooden lseparable pulleys.

If .it is desired to use one of these pulleys as a loose pulley, the thimble H should not be split, but fitted to and placed upon the shaft in the usual way, and the pulley then applied to the thimble, as described.

Having described our invention, what we claim as new is y IOO 1. A separable pulley whereof', when the meeting ends of the rim are in Contact, the meeting faces of the spoke bar and hub are slightly separated, as described, combined with clamp-bolts G, whereby said hub is clamped upon the shaftfin the manner set forth.

2. A separable pulley whereof, when the meeting ends of the rim are in contact, the meeting faces of the spoke bar` and hub are slightly separated, and clampin g-bolts G, conibined with a separate thimble, H, to he placed intermediate to the shaft and pulley, as set forth.

3. A separable pulley whereof, when the meeting ends of the rim are in Contact, the meeting faces of the spoke-bar are slightly separated, and clamp-bolts G, combined with a separable split thimble interposed between said shaft and pulley, substantially as set forth.

4. A separable pulley,A,composed of wooden segments a b c, &e., as set forth, provided VALLAGE H. DODGE. GEORGE PHILION.

fitncsses:

R. D. O. SMITH, J. C. TURNER, WILL W. DODGE, J. A. h'IcMIenAnL. 

